Display base



FIG. 1 is a perspective view showing the new design for a display base;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, a left side view being a mirror image thereof; and,

FIG. 5 is a top view thereof, a bottom view being a mirror image thereof.

The portions of the display base in FIGS. 1-5 shown in broken lines are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a display base, as shown and described. 